MultilingualPress Alternative Title to Admin Bar Site links

mlp-site-link-admin-bar.php

<?php
/**
 * Plugin Name: MultilingualPress Alternative Title to Admin Bar Site links
 * Plugin URI:  https://github.com/inpsyde/multilingual-press
 * Description:
 * Author:      Inpsyde GmbH
 * Author URI:  http://inpsyde.com
 * Version:     20.05.2015
 * Text Domain: multilingualpress
 * Domain Path: /languages
 * License:     GPLv2+
 * Network:     true
 */

add_action( 'mlp_and_wp_loaded', 'mlp_site_link_admin_bar' );
function mlp_site_link_admin_bar() {

	add_action( 'admin_bar_menu', 'mlp_change_admin_bar_site_items', 11 );
	add_action( 'admin_bar_menu', 'mlp_change_admin_bar_site_name', 999 );
}

/**
 * Get alternative title, if exists
 *
 * @param $site_id
 *
 * @return bool
 */
function mlp_get_alternative_title( $site_id ) {

	// Get settings
	$settings = get_site_option( 'inpsyde_multilingual' );

	// Get alternate site title
	if ( isset( $settings[ $site_id ][ 'text' ] ) ) {
		$site_title = $settings[ $site_id ][ 'text' ];
	}

	if ( ! isset( $site_title ) ) {
		return FALSE;
	}

	return $site_title;
}

/**
 * Change strings inside the admin bar for User Sites
 *
 * @param $wp_admin_bar
 *
 * @return mixed
 */
function mlp_change_admin_bar_site_items( $wp_admin_bar ) {

	foreach ( (array) $wp_admin_bar->user->blogs as $blog ) {

		$alternative_title = mlp_get_alternative_title( $blog->userblog_id );
		if ( $alternative_title ) {
			$wp_admin_bar->user->blogs[ $blog->userblog_id ]->blogname = $alternative_title;
		}
	}

	return $wp_admin_bar;
}

/**
 * Change strings inside the admin bar for site name of current site
 *
 * @param $wp_admin_bar
 *
 * @return mixed
 */
function mlp_change_admin_bar_site_name( $wp_admin_bar ) {

	$site_name = $wp_admin_bar->get_node( 'site-name' );
	$alternative_title = mlp_get_alternative_title( get_current_blog_id() );
	
	// Lease default in Network Admin Area 
	if ( is_network_admin() ) {
		return $wp_admin_bar;
	}
	
	// Change title for each blog
	if ( $alternative_title  ) {
		$wp_admin_bar->add_node(
			array(
			'id'    => 'site-name',
			'title' => $alternative_title,
			)
		);
	}

	return $wp_admin_bar;
}